Stocky Galaxias
Scientific name
Galaxias tantangara
Status in NSW
Critically endangered.
Characteristics
The Stocky Galaxias is a small, stocky fish. Distinguishing features include:
- Rounded snout
- Gold eye
- Translucent gill covers
- Dark brown to almost black spots and flecks that vary in size along the body, head and snout
- Dark olive to brown colour on the back becoming lighter brown to cream underneath
- Translucent fins that are dusky grey
Species similar in appearance
Stocky Galaxias can be confused with various other galaxid species.
Size
Individuals have been recorded to grow to 103mm long and 13g in weight, but they are more commonly seen at 75-85 mm long. Newly hatched larvae are around 9.4mm long on average.
Distribution
The Stocky Galaxias is only known from one locality – the headwaters of Tantangara Creek, upstream of the Tantangara Reservoir, Kosciusko National Park NSW. It is restricted by trout to a 4km stretch of the creek above a waterfall, approximately 4km from the source.
Habitat
Very little is known about the ecology and environmental requirements of the Stocky Galaxias. Its present distribution and habitat is a small, cold, clear and fast flowing alpine creek, flowing through an open forest of Eucalypts, low shrubs and tussock grass, which are often covered in snow during winter. The creek consists predominantly of riffle and glide with substrate composed of bedrock, boulder and cobble with smaller amounts of pebble and gravel and sections of silt.
Why is the Stocky Galaxias threatened?
- Very limited distribution - the species is confined to approximately 4kms of Tantangara Creek in Kosciusko National Park (NSW) making it extremely vulnerable to any threatening process
- Competition with and predation by introduced species
- Loss of riparian vegetation, overgrazing and sedimentation as a result of pest animals and bushfires
- Climate change and associated extreme weather events
